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◆ DNS & Domains 7 tools

🔍 DNS Lookup Query A, AAAA, MX, TXT, NS, CNAME, SOA and more. Fast server-side resolution. 🌐 DNS Propagation Compare DNS answers from public resolvers worldwide to spot stale or partial propagation. 📋 WHOIS Lookup WHOIS for domains and IPs. .gr/.ελ via official FORTH registry; country TLDs (.de, .uk, .fr, .nl, .eu, …) use the right registry server. Batch up to 12. ✉ SPF / DMARC / DKIM Check SPF, DMARC and DKIM records for a domain. Useful for email deliverability. 📨 SPF Generator Build a valid SPF TXT record from includes, IPs, and policy — copy into DNS. 📬 MX Lookup List MX hosts and priorities for a domain — quick mail routing checks. 📧 DMARC Generator Build a DMARC TXT record for _dmarc with policy, reporting URI, and alignment options.

◆ IP & Network 3 tools

🌍 My IP & Headers See your public IP, geolocation, ASN, ISP and incoming HTTP headers. 📍 IP Lookup Lookup any IP address for location, ASN, organization and reverse DNS. ↩️ Reverse DNS Find the hostname(s) associated with an IP address.

◆ Web & HTTP 4 tools

📡 HTTP Headers Fetch and inspect all response headers from any URL. Great for debugging. ⚡ HTTP/2 Check Probe whether a host speaks HTTP/2 or HTTP/1.1 over TLS with curl. 🔒 SSL Certificate Checker Check certificate chain, expiry, SANs, issuer and validity for any domain. ➡️ Redirect Tracer Follow HTTP redirects and see the full chain with status codes and locations.

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🛡️ Security Headers Check a site for important security headers (HSTS, CSP, X-Frame-Options, etc.). 🪪 JWT Decoder Decode JWT header and payload (no signature verification). For debugging tokens only. 🔑 Password Strength Estimate entropy and common-pattern risk. Runs entirely in your browser.

◆ Utilities 6 tools

{ } JSON Formatter Format, validate and minify JSON. Still one of the most used dev tools. # Hash Generator Generate cryptographic hashes. Useful for verification and integrity checks. 64 Base64 Encode/Decode Encode or decode Base64 text in the browser. ⏰ Cron Expression Parse standard 5-field cron syntax into plain English schedule hints. *** Password Generator Generate random passwords with configurable length and character sets. uid UUID Generator Generate random UUIDs for IDs, correlation tokens, and test data.

◆ Tools / DNS & Domains / DMARC Generator

📧

DNS & Domains

DMARC Generator

Build a DMARC TXT record for _dmarc with policy, reporting URI, and alignment options.

Domain

Policy (p=)

pct (0–100)

Aggregate reports (rua)

SPF alignment

DKIM alignment

Publish at _dmarc.yourdomain.com as a TXT record.

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